Mesozoic-Cenozoic Structural Evolution in QaidamBasin and Its Control Over Oil and Gas

Abstract

Abstract: Based on the comprehensive analysis of regional structure background, boundary conditions, basement properties, structura lmov ement, unconformable surfa ce, stratigraphic distribution, sedimentary characters, structural evolution history, it is considered that the Miozoic-Ceozoic structural evolution of Qaidam Basin has undergone two structural cycles of extension and compression, which can be divided into four evolution stages including the Ea rly toMiddle Jurassic extensional rift and depression sta ge, the Late Jurassic to Cretaceous compression depression and uplift stage, the Paleocene(Lulehe age) to Early Miocene(Shangyoushashan age) integer compression depression and the western Qa idam Basin regiona l pull-apart feeble rift stage, as well as LateMiocene(Shizigou age) to Quaterna ry compression inversion stage. The basin structural evolution controls the distribution and evolution of hydrocarbon resource rocks, the formation of traps, as well a s the migration, accumulation a nd preserv ation of oil and gas, and further controls the distribution of oil a nd gas.

Key words: Qaidam Basin, Mesozoic-Cenozoic era, structura l evolution, hydrocarbon control action, exploration direction

CLC Number:

P618.13

Xu Fengyin, Yin Chengming, Gong Qinglin and Shen Ya. Mesozoic-Cenozoic Structural Evolution in QaidamBasin and Its Control Over Oil and Gas[J]. China Petroleum Exploration, 2006, 11(6): 9-16,37,129.

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Mesozoic-Cenozoic Structural Evolution in QaidamBasin and Its Control Over Oil and Gas

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